S - Primal sunflower is my favourite tbh, great middle price between sunflower and twin sunflower, very consistent (unlike shrooms or moonflower which give sun depending on other factors) basically the most reliable option

A - Sun shroom is the second best but it has flaws in taking some time till it finally grows up which is sometimes bad considering some levels are too fast paced, and if it gets eaten you unfortunately have to replant and wait till it grows meaning that its always isnt consistent, but its generally the second best option thanks to its cost efficiency and amount of suns it produces later on

B - Moonflower is too dependent on having two rows to actually give good amount of suns, plus its recharge makes it forever to plant two rows and its plant food effect is really terrible. its okay i mean, but i would never really use it due to it being outclassed unless you want to use the shadow plants

C - Twin sunflower, i really hate this plant idk why its so overrated, its recharge is terrible, costwise its the most expensive not even giving the amount its worth whats even good about it? I never used this plant and ill never will tbh, id rather plant two rows of sunflowers instead if i need to